14C (carbon-14) can be used to date a 20,000 year old skeleton
Answer;
- REM sleep, Transitional sleep.
The dozing, half-awake state often seen in newborns is called REM sleep, transitional sleep.
-REM sleep is characterized by eye movement, increased respiration rate and increased brain activity. REM sleep is also referred to as paradoxical sleep because, while the brain and other body systems become more active, your muscles become more relaxed, or paralyzed.
-Dreaming occurs in REM sleep because of increased brain activity, but voluntary muscles become paralyzed. Voluntary muscles are those that you need to move by choice, for example, your arms and legs.
i think the answer is "Rocks are made up of many different minerals that are bound together"
They may have ran out of oxygen, or they may not have been water dwelling snails, as not all are, lack of food, no flow of water into and out of the tank would cause them to run out of oxygen.
